It’s like writing a sales, marketing, solicitation, or fundraising letter. The writer really is a sales person, selling other people with their expressed consent. It’s like writing a Case for Support statement, with a certain structure to it. The piece needs to be written in an asserting tone, and contain elements typically of all marketing material.
Start off with a grabbing first line or paragraph. Something positively arresting (but not flirty) that surely will rouse the interest of the reader and possibly gets him or her hooked.
The, do this…
Phrases to use
mindful / responsive, outspoken / quite, social / private,
well-rounded, intelligent, conscientious,